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International Workshop on Advanced Computational Intelligence (IWACI)

作者： Fuqiang Xie Ye Yang Songtao Chang Yongji Wang School of Electric Engineering University of South China Hengyang China Beijing AeroSpace Automatic Control Institute Beijing China Department of Control Science and Engineering Key Laboratory of Ministry of Education for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan China

Solving the optimal control problem with a free final time, such as suborbital launch vehicle (SLV) trajectory optimization with two control variables and multi-constraints ones based on particle swarm optimization (PSO), the smoothness of control variable can not be satisfied by linear interpolation method. A novel method including some improving strategies based on PSO for trajectory optimization is proposed, named LCPSO which is a kind of Cooperate PSO based on Legendre orthogonal polynomials. An additional control variable is introduced and transcribes the original optimal problem to a problem with fixed final time, and one dimension searching method based on interval analysis is used to optimize the additional control variable. Furthermore, a theorem on how to find the boundaries of the coefficient of polynomials is proved. Compared with basic PSO, LCPSO has traits of lower dimensions and smoother control variable. An example of trajectory optimization shows the effectiveness of the LCPSO algorithm.

关键词： Polynomials Optimization Switches Trajectory Optimal control Vehicles Approximation methods

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Infrared and color visible images fusion based on color transfer and information entropy

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Guangxue Xuebao/Acta Optica Sinica 2011年第SUPPL.1期31卷

作者： Zhang, Qiang Guo, Baolong Intelligent Control and Image Engineering Institute School of Electromechanical Engineering Xidian University Xi'an Shaanxi 710071 China

Combining with the lαβ color space and the nonsubsampled contourlet transform (NSCT), a novel fusion algorithm for infrared and color visible images based on the color transfer and information entropy was proposed. Firstly, the R, G, B bands of the color visible image were averaged and then the intensity component image was attained. Secondly, the attained component image and the infrared image were merged based on the NSCT and then a grayscale fused image was obtained. Lastly, a color transfer method based on the lαβ color space was employed to transfer the color information of the color visible image into the fused grayscale image and then the final fused color image wss attained. When the grayscale visible image and the infrared image arefused, according to the physical characters of the infrared image, a weighted averaging scheme based on the local area mean and local area information entropy was proposed for the lowpass subband coefficients. As well, according to the distribution differences of the noise and the geometric characters of the image in the NSCT domain, a selection principle based on the local area direction entropy and the local area energy was proposed for the bandpass directional subband coefficients. Experimental results demonstrated that the proposed algorithm not only can extract the abundant background information of the visible image and the target localization information of the infrared image, but also can make the fused color image maintain the nature color information of the visible image as much as possible.

关键词： image fusion

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Simulation study and characteristics analysis of the ERT sensor

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ICIC Express Letters, Part B: Applications 2011年第4期2卷 865-871页

作者： Wang, Pai Guo, Baolong Li, Nan Institute of Intelligent Control and Image Engineering Xidian University No. 2 South Taibai Road Xi'an 710071 China Department of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology No. 5 South Zhongguancun Street Haidian District Beijing 100081 China

3D simulation of an ERT sensor field is established using COMSOL and MATLAB 7.0 to study the limitations of an ERT system's sensor field and determine the influence of electrode size and geometry on the established field. As a result of the analysis, a pointed electrode array and a rectangular-shaped electrode array were designed and their frequency characteristics were tested by measuring conductance in milk flows. The results indicate that increasing the width and height of the electrode is beneficial to improving the axial and radial distribution of the sensing field. Increasing the electrode area can reduce "connection resistance" and enable the ERT sensor to have more stable frequency characteristics and improve the SNR of the ERT system. © 2011 ISSN 2185-2766.

关键词： MATLAB

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Capacitive sensor design for an automatic car-wiper system

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ICIC Express Letters, Part B: Applications 2011年第4期2卷 879-884页

作者： Li, Nan Han, Ying He, Cunfu College of Mechanical Engineering and Applied Electronics Technology Beijing University of Technology No. 5 South Zhongguancun Street Haidian District Beijing 100081 China Institute of Intelligent Control and Image Engineering Xidian University No. 2 South Taibai Road Xi'an 710071 China

A new structure of capacitive sensor used for an automatic car-wiper system is presented. It aims to develop a low-cost sensor with high sensitivity and robustness. The working principles of the sensors used for liquid on the surface detection are introduced. Three types of proximity capacitive sensors of different shapes are designed under the same outer diameter. The parameters affecting the sensor signal strength and measurement sensitivity are discussed based on the performance analyzing of the sensors. The electric field distributions of the sensors are simulated and the fringe capacitance of the sensors is measured and analyzed. For the flower-shaped sensor, the noise analysis is presented and the measurement results are given. The effects of the excitation's frequency are experimented and the optimum frequency of the excitation is determined. The experimental results indicate the validity and importance of the capacitive sensing technique which can be used for liquid detection on windshield of vehicles, and the new structure of the sensor has greater measurement performance, especially in signal strength and the sensitivity. © 2011 ISSN 2185-2766.

关键词： Capacitive sensors

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Universal Steganalysis Based on Local Prediction Error in Wavelet Domain

Universal Steganalysis Based on Local Prediction Error in Wa...

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International Conference on intelligent Information Hiding and Multimedia Signal Processing (IIHMSP)

作者： Anahita Shojaei-Hashemi Mostafa Mehdipour-Ghazi Shahrokh Ghaemmaghami Hamid Soltanian-Zadeh School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran Electronics Research Institute Sharif University of Technology Tehran Iran Image Analysis Laboratory Department of Radiology Henry Ford Health System Detroit MI USA Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering College of Engineering University of Tehran Tehran Iran

A passive universal image steganalysis method is proposed that is shown to be of higher detection accuracy than existing truly blind steganalysis methods including Farid's and the WAM. This is achieved by improving some weaknesses of Farid's steganalysis scheme in feature extraction, that is, instead of deriving an over-determined equation system for each sub band of the wavelet decomposition, the sub bands are divided into overlapping blocks and an over-determined equation system is constructed for each block. To guarantee the existence of finite answers, the over-determined equation systems are solved in a way different from Farid's by using Moore-Penrose pseudo-inverse concept. Further improvement to the performance is achieved by adding diagonal directions and increasing the number of moments. The comparative evaluations confirm the superiority of the proposed method over prevalent blind steganalysis schemes.

关键词： Equations Mathematical model Payloads Transform coding Correlation Educational institutions Reliability

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Optimization for the directional filter bank of the nonsubsampled contourlet transform

Optimization for the directional filter bank of the nonsubsa...

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International Conference on Natural Computation

作者： Yan, Chunman Guo, Baolong Yi, Meng Institute of Intelligent Control and Image Engineering Xidian University Xi'an China

ISBN: (纸本)9781424459612

The contourlet Transform is an efficient directional multiresolution image representation, but it is not shift-invariant. The nonsubsampled contourlet transform (NSCT), is a fully shift-invariant, multiscale, and multidirection expansion that has a fast implementation, but the computational efficiency is lower than the contourlet transform, such an efficient representation has to be obtained by structured transform and fast algorithm. In this paper, we adopt an optimized directional filter bank and embed it into NSCT to pursue the desired speed, sacrificed the PSNR of the reconstructed image, we obtain the obvious increase of processing speed. Experimental results show that the quality of reconstructed image is sufficient for the human visual system (HVS), and the modified NSCT has a speed about several times than the speed of the customary one, this is very valuable for practical applications of the NSCT. © 2010 IEEE.

关键词： Contourlet transform

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PARTICLE SWARM OPTIMIZATION（PSO）OF POWER ALLOCATION IN COGNITIVE RADIO SYSTEMS WITH INTERFERENCE CONSTRAINTS

PARTICLE SWARM OPTIMIZATION（PSO）OF POWER ALLOCATION IN COG...

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2011 4th IEEE International Conference on Broadband Network and Multimedia Technology

作者： Saeed Motiian Mohammad Aghababaie Hamid Soltanian-Zadeh Control and Intelligent Processing Center of Excellence School of Electrical and Computer Engineering Colleague of EngineeringUniversity of TehranTehran 14399-57131Iran School of Cognitive Sciences Institute for Research in Fundamental Sciences(IPM)Tehran 19548-56316 Iran Image Analysis Laboratory Radiology DepartmentHenry Ford HospitalDetroitMichigan 48202USA

Cognitive radio is used for enhancement of spectrum *** many works have been accomplished on the power allocation of cognitive radio,limited efforts have considered evolutionary *** this paper,we study this problem in the cognitive radio networks where interference constraints are defined for protection of quality of service（QoS）for both primary and secondary *** defined as functions of the signal-to-interference-plus-noise ratio（SINR） are matched for each secondary user which meets Nash’s *** general,the region of utilities that meets the constraints is *** is possible to make simplifications,generate a convex region,and then use common convex optimization approaches to obtain a ***,Particle Swarm Optimization（PSO）does not need such simplifications and thus its results are superior to those of the convex optimization *** is an evolutionary algorithm based on social intelligence,utilized in many optimization *** is a global optimizations algorithm that does not require the objective function be differentiable as required in classic optimization methods.

关键词： Cognitive radio Power allocation Particle Swarm Optimization（PSO）.

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Three-dimensional analysis on resistance tomography sensors and its application in inspection of milk flow

Three-dimensional analysis on resistance tomography sensors ...

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2010 8th IEEE International Conference on control and Automation, ICCA 2010

作者： Pai, Wang Guo, Baolong Li, Nan Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China

ISBN: (纸本)9781424451951

3D simulation of ERT sensor is established with multi-physical coupling software COMSOL and MATLAB7.0, analyze the limitation of ERT system 3D sensor field and deeply study the influence on the established fields by sizes of electrodes and frequency characteristics. Thus, design two kinds of sensors of pointed electrode array and rectangular-shaped electrode array and also carry out comparison test on frequency characteristics during the detection of milk flows. The result shows that increasing width and height of electrodes is favorable for improving uniformity of sensitivity field in a radial and axial distributions. It also shows that increasing area of electrodes can reduce "Contact resistance" and have more stable frequency characteristic, which is good for increasing SNR of ERT system, thereby, providing evidence and convenience for optimization design of sensors and reconstruction of images. © 2010 IEEE.

关键词： Electrodes

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RST invariant image watermarking based on invariant contents

RST invariant image watermarking based on invariant contents

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International Conference on Genetic and Evolutionary Computing (ICGEC)

作者： Li, Xin-Wei Guo, Bao-Long Chen, Long Institute of Intelligent Control and Image Engineering Xidian University Xi'an 710071 China

ISBN: (纸本)9780769542812

An image watermarking scheme resisting RST (rotation, scaling, translation) based on RST invariant square region is proposed in the paper. Two SIFT (scale-invariant feature transform) feature points are selected to determine the position, size, direction of the region. The watermark embedding and detection is completed in the square region with quantization, which could guarantee blind detection. A binary image is employed to be the watermark due to the improvement of watermark capacity. Experimental results show that the proposed scheme can effectively resistant geometrical attacks as well as common signal processing. © 2010 IEEE.

关键词： image watermarking

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Novel image retrieval method based on interest points

Novel image retrieval method based on interest points

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2010 3rd International Congress on image and Signal Processing, CISP 2010

作者： Meng, Fanjie Guo, Baolong Fang, Yiqi Institute of Intelligent Control and Image Engineering Xidian University Xi'an China Xi'an Electronic Engineering Research Institute Xi'an China

ISBN: (纸本)9781424465149

Traditional interest points based image retrieval methods employed local features of interest points to describe image. The difference between local areas of interest points and the region of interest limited the retrieval accuracy. Considering the shape characteristic of interest points, this paper presented a new image retrieval method based on region of interest determined by interest points. Firstly, interest points were detected by tracking wavelet coefficients of different scales. Secondly, the convex hull of interest points was calculated to extract the region of interest in the image. Then color and shape features of the region were used to describe an image. Finally, the weighted feature distance was used to define the similarity between two images. With robustness to image rotation, translation and scale, the method makes the retrieval implementation at the object level and avoids the shortcoming of traditional methods. Lots of experiments based on an image database containing 1100 images show that the method improves the average retrieval precision over 11.1 percent, compared with other interest points based retrieval methods. ©2010 IEEE.

关键词： image retrieval

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